Improvement in painting on translucent surfaces



UNITED STATES PATENT QFFICE.

J. BISHOP HALL, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN PAINTING CN TRANSLUCENT SURFACES.

Specification forming part of Letters Patent No. 5,495, dated March 28, 1848.

' ings, which method or process I denominate Tachygraphic Painting, and I do hereby declare the following to be a full, clear, and exact description of the same.

The nature of my invention consists in preparing plates of glass with a translucent coating, which will receive and retain dry colors, and also admit of the application of colors ground in oil without spreading, while at the same time serving as a dispenser of light, and in placing in the rear of the picture (executed upon the plate of glass thus prepared) a brilliant reflecting-surface, which, acting in connection with the translucent coating upon the glass, will give to the picture a highly-luminous appearance.

To enable others skilled in the art of painting to use my invention, I will proceed to describe my method or process oi'executing tachygraphic paintings.

I'apply to plates of glass it very thin coating of boiled linseed-oil, and dust immediately upon the oiled surface very finely pulverized silex. The object of this translucent coating is, first, to enable me to apply dry colors to the glass; second, to enable me to apply colors ground in oil without their spreading; third, enabling me to make use of the coating of the glass for the high lights of a picture, which may be brought out faintly or very brightly by partially removing the coating with the point of a knife and tempering the same witha small brush; fifth, the translucent coating upon the glass ground also serves as a dispenser oflight. Thereflecting-surt'ace which I place in the rear of the picture, acting in connection with the translucent coating, causes the picture to appear highly illuminated, and produces an atmosphere at once to the paintin g.

I generally make use of pulverized French crayon No. 2 and blue-black paint in executin'g paintings by my improved process. I

The paintings may be highly colored by using transparent paints, either before or after the preparation of the glass, as before described.

Transparent paper may be used as a ground on which to paint, instead of glass.

I do not confine myself to the use of silex in preparing the translucent surface to the glass. Other substances-such as glass, spar, &c.- will answer instead. For the reflecting-surface to be placed in the rear of the painting I generally make use of plates of tin or sheets of silvered copper In preparing the translucent surface of the glass on which the painting is executed I generally make use of sixty drops of oil to a plate of glass fourteen by twenty inches, and then dust on the silex to such a degree that when the plate is held obliquely to the rays of light from a window the light will be but imperfectly reflected.

\Vhat I claim as my invention, and desire to secure by Letters Patent, is

The improved method or process, denominated by me Tachygraphic painting, by which I produce brilliantpaintings or pictures upon a translucent prepared ground, with a reflecting-surface in the rear of the same, substantially in the manner herein set forth.

J. BISHOP HALL.

Witnesses:

GRA. 1?. Loan, S. G. DONN. 

